Originally Posted by
prj71
Again...Just buy a quality tire. Problem solved.
It has nothing to do with being tubed or tubeless.
Yeah, I suppose that for the price of all these flat-preventing gimmicks, one might as well just buy a tougher tire.
So then is the new question,
"What are some tough 26" mountain bike tires that doesn't cost an arm and a leg?" 
My relative will typically ride either on road or gravel. He doesn't actually do any mountain biking, so perhaps a tough tire with some sort of center ridge would make sense.